This is primarily a link for my friend Lord Omlette:
It’s a turn-based strategy Flash game that emulates trying to survive a zombie apocalypse while reclaiming a city. You have to recruit survivors, build buildings, fend off hordes, expand your new city walls, keep people happy and fed, etc. It’s actually really good, and really addictive.
I know that Omlette has a giant fear of zombies, and this would be a good exercise for him in case of a zombie apocalypse.